Upper Paleozoic Reservoir Characteristics of Daniudi Gas Field In Ordos Basin
Cao Zhonghui (Research Institute of Exploration and Development, North China Company, SINOPEC, Zhengzhou 450006,China), Wang Jianhuai and Guo Jianmin.
Daniudi Gas Field lies in the north of Yishan Slope in Ordos Basin. Its mainly gassy formations are Carboniferous Taiyuan Formation, Permian Shanxi Formation and Lower Shihezi Formation. It has three reservoir sands: the barrier bar of Carboniferous Taiyuan Formation, delta-plain distributary channel sand of Permian Shanxi Formation and fluvial facies channel sand of Lower Shihezi Formation. The reservoir sands are low porous, low permeable and tight. The characteristics of Lower Shihezi Formation, Shanxi Formation and Taiyuan Formation are same basically. The porous structures of the Lower Shihezi Formation and Taiyuan Formation are better than Shanxi Formation’s. There are four types in the Upper Paleozoic reservoir. Reservoir typeⅠand Ⅱ show a more development in Lower Shihezi Formation and Taiyuan Formation, and reservoir type Ⅲ presents a more development in Shanxi Formation. The reservoirs of Lower Shihezi Formation and Taiyuan Formation are better than Shanxi Formation’s.
【CateGory Index】： P618.13